<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			#wrap2{
				width: 34.375rem;
				border: 0.1875rem solid red;
			}
			.class1{
				width: 12.5rem;
				height: 25rem;
				background: blue;
				float: left;
			}
		</style>
	</head>
	<body>
		<div id="wrap2">
			<div class="class1"></div>
			<div class="class2"></div>
			<div class="class3"></div>
			<div class="class4"></div>
		</div>
	</body>
</html>
